Loose ? 😭

Soooo my now ex husband cheated on me while I was pregnant & even postpartum. I found out and while I was asking WHYYY !!!! (I just needed to know why) he was saying that I felt different to him . 😐 he said ever since I got pregnant I felt a little loose & then after I had the baby. We stayed together for about 6 months after I found out . But are now divorcing because I just can’t handle it not being able to trust him. But anyways my question is, how do I get back tight?! Do kegeals really work? I’m SO self conscious and nervous to have sex with anyone else again. Which I’m not worried about right now but in the future . What if I’m just loose smh . Is that even a thing ? Cause I couldn’t feel a difference but he made me feel weird about it ever since then. Idk if it was just an excuse for him cheating but ugh. It’s always in my mind